<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        ol li {
            color: aquamarine;
        }

        ul li {
            color: blue;
        }

        .nav li {
            color: chocolate;
        }

        ol li a {
            color: blueviolet;
        }
    </style>
</head>

<body>
    <ol>
        <li>ded</li>
        <li>sadsd</li>
        <li>vdssvd</li>
        <li><a href="#">errer</a></li>
    </ol>
    <ul>
        <li>sdvvds</li>
        <li>dssvd</li>
        <li>vdsdcs</li>
    </ul>
    <ul class="nav">
        <li>sdvvds</li>
        <li>dssvd</li>
        <li>vdsdcs</li>
    </ul>
</body>

</html>